Binders for glass fiber threads



Patented Mar. 20, 1945 UNITED STATES PATENT OFFICE BINDERS FOR GLASS FIBER THREADS Hans Stcinbock, DusseIdorf-Gerresheim, Germany; vested in the Alien Property Custodian No Drawing. Original application July 12, 1939,

Divided and this application June 17, 1941, Serial No. 398,421. In Ger- Serial No. 284,100.

many July 14, 1938 5 Claims. (01. 106-132) This invention relates to binders for threads or strands of glass fibers and like fibers, of the general character described and claimed in my application Serial No. 284,100, filed July 12, 1939, which matured into Letters Patent No. 2,245,620, and from which the present application is a division.

According to my present invention the binder consists of diluted aqueous solutions of animal, vegetable or mineral oils, fats, waxes and the like or mixtures thereof and gelatine as an adhesive.

These emulsions can be prepared in the usual manner practised in the art of making emulsions with the use of suitable emulsifying agents.

A glass fiber thread or strand sized with a binder according to the invention after the setting of the binder is'well closed, soft and supple and has a brilliant, slightly fatty surface which renders it highly suited for textile treatments. The setting of the binder may be accelerated by artificial drying. The binder can be readily removed again by the common textile washing media, such as aqueous soap solutions or the like.

An example of a binder according to the invention is composed as follows:

nounced binding eiiect or a more pronounced lubricating effect as desired in accordance with the purpose for which it is used by a proper selection of various oils or by suitably mixing oils and fats, adding waxes and using suitable emulsifying agents. Thus, various modifications and variations may be resorted to without departing from the spirit and scope of the present, invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A binder and lubricant for glass fiber strands comprising a dilute aqueous emulsion containing 3 .to 5% fatty acid sulphonate as an emulsifying agent, 3 to 5% lubricant consisting of oil, and 3 to 5% gelatine as a binder.

2. A treating material for glass fiber strands comprising a dilute aqueous emulsion containin 3 to 5% fatty' acid sulphonate as an emulsifying agent, 3 to 5% fats as a lubricant, and 3 to 5% gelatine.

3. A binder and lubricant for glass fiber strands comprising a. dilute aqueous emulsion containing a 3 to 5% emulsifying agent consisting of fatty acid Parts Water 80 to 90 Emulsifying agent such as fatty acid sulphonate 3to 5 Animal or vegetable oil 3to 5 Gelatine 3t0 5 After application of this binder to the strand and after evaporation of the water, the strand, of course, is coated with the solid constituents of the binder, each present in proportions of about 23% to 45% of the total amount of the coating material on the strand.

Without affecting the possibility of removing the binder from the finished products by washing. the binder may be given either a more prosulphonate, 3 to 5% wax as a lubricant, and 3 to 5% gelatine.

4. A binder and lubricant for glass fiber strands 

